Tool.



L. S. FROST.

TOOL.

APPLICATION FILED MAY 9, 1910.

:Patented 0013. 13, 1914.

IIL? atty.

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LORENZO S. FROST, OF CAMBRIDGE, MASSACHUSETTS.

TOOL.

Specification of Letters Patent.

Application filed May 9, 1910.

Patented oct. 13, 1914. serial No. 560,303.

To all whom it may concern:

Be it known that I, LORENZO S. FRos'r, a citizen of the United States, and a resident of Cambridge, in the county of Middlesex, State of Massachusetts, have -invented an Improvement in Tools, of which the following description, in connection with the ac companying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates tO tools adapted for soldering and other purposes.

The character of the invention may be best understood by reference to the following description of an illustrative embodiment thereof shown in the accompanying drawing, wherein:

Figure 1 is a vertical section of the tool illustrated herein as embodying my invention; Fig. 2 is a side view of Fig. 1 with a detachable shield applied to the device; and Fig.` 3 is a section taken on line 3 3 of Fig. l.

Referring to the drawing, the illustrative tool shown herein as embodying my invention comprises a fuel tank herein consisting of a cylindrical shell l having flanged heads 3 and 5 closing 'its opposite ends. This tank is adapted to contain any suitable fuel such, for example, as gasolene or kerosene, which may be introduced into said tank through a filling hole in the head 5 adapted to be closed by a plug 7 threaded into said head and having a flange seated on a washer 9. Said tank is adapted to supply fuel to a burner herein connected to said tank by a stem 11 threaded intoa cup-like recess 13 in the lower wall of the shell 1, said recess having an aperture at its base for admitting the fuel from the 'tank to said stem. This stem is provided with a duct 15 leading from the cup aperture to a head 16 herein integral with said stein and provided with a duct 17 extending transversely to and communicating with said duct 15. The fuel led from the tank through said ducts is thence conducted by a straight pipe 19 secured to said head 16 and extending outwardly toward the end of the burner where it is bent into the form of a helical coil 21 leading back to the head 16 and is connected thereto to communicate with a chamber 23 therein having a valve seat 25 in the base thereof adapted to be controlled by a needle valve 26 having its shank threaded into said head and provided with aV suitable hand wheel 27. To prevent leakagethere may be provided a cap L29 threaded to a boss on said head and containing suitable packing material 31. The straight pipe 19 and coil 21 may be inclosed by a suitable tube 33 having one end threadedto a boss 35 projecting from the head 16. f To concentrate the flame issuing from said tube, as more fully hereinafter described, the opposite end of said tube maybe tapered or reduced as at 37. To admit air within the coil the, upper portion of the tube 33 maybe provided with air admission perforations 39. The fuel is led through the ducts 15 and 17 and is heated and vaporized on its passage through the coil 21 and issues from the chamber 23 under the control of the needle valve 26. f To connect the burner to the tank the stem 11 is screwed into the cup-like recess 13 of the tank 1 and the tube 3 3 'is then screwed over the end of the pipek 19. To prevent inadvertent unscrewing of the stem, 11 the flange of the cylinder head 3 may be extended to form a bracket 40 projecting laterally therefrom and curved to conform to the contour of the tube 33 (Fig. 3). Preferably this bracket should not directly engage said tube but should be spaced slightly therefrom, but by virtue of its curvaturewill effectually prevent unscrewing of the stem 11 so long as the tube 33 is connected to said stem.k A feature of this burner is the position of the needle valve with respect to the coil. It will be observed that this valve is locatedfat the delivery end of the coil at the point where the fuel is admitted directly into themixing chamber formed by the space within the coil. As a result the fuel may be shut ofi1 instantly at any time desired, without a continuance of the flame thereafter, such as would be the case were the valve located at' the commencement of the coil, the residual fuel in the coil in such case being sufficient to cause a continuance 4ofthe burning for several minutes after the valve is closed.

The burner described is compact in construction and simple in operation; the needle valve handle is positioned up away from the hot end of the burner and in a conveniently accessible position. This burner is further found to be of very advantageous construction, since it is adapted to use not only gasolene but also kerosene as a fuel. There are building and yinsurance restrictions which prohibit the use of gasolene as a fuel. Under such circumstances the tank may be readily filled with kerosene and thereby conform to these requirementsv and as a result the field of usefulness of the device is unlimited.

rf'he tool to be heated herein is connected directly to and carried by the tank l. To this end said tank is provided with a tool receiving tube ll projecting centrally into said tank in the direction of the length thereof and having an end adapted to be threaded into an outwardly proj ecting boss 43 on the cylinder head 3. The inner end of the tube 41 may be closed by a suitable cap el threaded thereon.

While the device embodying my invention is adapted to be used in connection with a variety of dierent tools, such, for example, as soldering irons and paint removing` devices, for purposes of illustration I have shown the device herein in connection with a soldering iron comprising an iron Ll5 having a stem il? adapted to be introduced into the tool receiving tube 41 and be retained adj ustably therein by a set screw 53 threaded into the boss i3 and adapted to engage the tool stem l? and securely press the latter against the interior of the tube lil. It will be apparent that this tubeA is sufficiently larve to accommodate tools of different sizes. To permit the iron 45 to be moved into different positions of adjustment said iron is not directly secured to said stem but is provided with a rounded butt end pivoted on a pin i9 carried by a yoke 51 threaded on the end of said tool stem 47. To adjust the tool the yoke 51 is turned on said stem thereby drawing the butt end of the tool away from said stem and permitting said tool to rock on the pin 49. Then said tool has been rocked `to the desired angle the yoke 5l is turned on said stem thereby causing the end of the latter to engage the rounded end of said tool and securely retain the latter with a tightness proportionate to the amount of turning given to the yoke.

To manipulate the device there may be provided a handle 55 adapted t0 contain a tube 57 having an end adapted to be threaded to a cup-like recess 59 which may be stamped or otherwise formed in the tank head 5. The end of the handle 55 may be provided with a ferrule 61 and the tube 57 may be secured within said handle by a friction fit which may be supplemented by a suitable set screw 63 if desired. To prevent the hand from slipping down on the handle into contact with the 'ferrule 6l the handle may be provided with an annular flange 65. The handle may be readily attached to said tank or disconnected therefrom and when be removed from the tank and inserted directly into the handle tube 57 and be secured thereto. By this arrangement the iandle may have the dual function of carrying the tank or directly carrying the tool.

An important feature of the invention relates to a construction in which a single burner is utilized both for heating the tool and the work operated on. Herein this is effected by positioning the burner obliquely with respect to the tool in such a manner lthat its fiame directly strikes the tool and the work, the flame projecting with a high heat beyond the tool and on striking the work is spread and very quickly raises the work to a fusing temperature at the same time'maintaining the tool at its proper heat. As a result the work may be heated to a higher temperature, more quickly and with less expenditure of fuel than by previous methods, since the heat does not need to be transmitted through the iron to heat the work but, on the contrary, the flame directly strikes the latter. lt will thus be apparent that a much smaller iron than heretofore used will suffice. Further, by the arrangement described none of the Haine is wasted since all of the flame which does not strike the tool strikes the work. The direct action of the fiame on the work is of great advantage in out-of-door work in the presence of rain or sleet. ln roofing, for example, rain or sleet will cool the surfaces to be soldered to such an extent as to make work thereon extremely difficult if not impracticable in using old types of soldering irons. But by my method the flame, in playing directly on the work, by the force of its heat and physical impact drives away the rain or moisture and permits the work to be carried on irrespective of wet weather. By adjusting the needle valve hand wheel 27 the iiame may be regulated to focus or spread on the work to the extent desired, according to the area of the work treated.

lli/Then the fuel is gasolene no auxiliary pressure device is necessary the pressure for creating the forced blast flame being maintained by the fact that heat is transmitted from the burner through the short stem l1 to the lower portion of the tank. assisted by the proximate and overlapping position of the burner with respect to the tank. Since the burner is offset from the axial line of the handle and tool, when the device is held with the tool end resting obliquely on the work and the handle in the hand the gravitational effect on the burner will tend to turn the device in the hand and maintain the burner beneath the tank and tool with the burner stem lea ding to the under portion of the tank. Since the burner is normally beneath the tank the heat conducted from the burner through the stem 11 will, by virtue of the physical law of rising heat, rise up through the interior of the tank This is cooler than said stem.

@vent dangerous pressure.

and effectually maintain a proper pressure therein. Also the radiant heat from the burnerV will rise and envelop the'tank and contribute to the heating thereof. The stem does not communicate directly with the interior of the tank but is connected to a tube 66 which extends upwardly and thence is bent downwardly presenting an open end at the lowest corner of the tank. The" liquid fuel in the tank is -cooler than the stem 11 and therefore tends to maintain the tube 66 Consequently the temperature of the stem is lowered by the conducting of heat therefrom to said tube. This prevents said stem from becoming obe jectionably hot at its entrance into the tank.

'To prevent blocking of said tube its lower end may be cut od obliquely as at 66a.

To strain the fuel fed from the tank o through the stem, there may be provided a mesh material which may be set into thek base of said cup-like recess 13 and held thereat by the engagement of the stem end therewith.

In some instances either the tube 66 or the disk 67 when used singly will suffice to pre- Vhile the conductive heat from the burneris very effective and creates sufcient fuel feed pressure in the tank when gasolene is the fuel, -when kerosene or alcohol is the fuel it may be necessary to use a pressure device such as a pump or-bulb. 1n such case a bulb 68 of usual construction may be Vconnected to one end of a flexible tube 68, the opposite end of which may be detachably connected to the nose of a short nozzle 68" threaded into a recess in theupper tank head 5, said nozzle being provided with a suitable cock 68C. It should be stated, however, that the bulb need only be attached and pressed at infrequent intervals to create the proper pressure since the conductive and radiant heat from the burner creates a pressure which is nearly sui'licient to supply kerosene to the burner. ln practice it is found that for indoor work the conductive heat from -the burner described is sufficient to vmaintain the proper pressure in said tank, but for out-of-door work or in cold weather to counteract the e'vdect of cool. air on the tank there may be provided additional means for heating the tank. `To this end I have provided a baiiie plate 69 herein adjustably connected by a slot 70 and set screw 71 to the tank head 8. This baliie plate is adapted to be projected through a slot in the side of the burner tube 33 beneath one of the air perforations 39 and into a spacebetween adjacent turns of the coil 21 described. The straight pipe 19 in the burner may be bent or offset as at 19a adjacent said plate to avoid interference therewith. When the baffle plate is thusy inserted into the tube it will cause a flame' to .the solder.

'project' laterally from said coil through the air perforation adjacent thereto, to strike directly against the tank 1 and heat the lat ter, thereby effectually counteracting the cooling influences of the surrounding air. 1V hen the device is used for indoor work it is merely necessary to loosen the set screw' 71 and slidethe baffle plate outwardly into a position merely to close the slot inthe side of the tube without enteringv the interior of the tube. *To further protectv the` device from the coolinginfluences such, for example, as occasioned by drafts in out-of-door work, there may be provided a shield 73 (Fig. 2). Herein this shield is made of sheet metaland is shaped to conform to they contour of the cylindrical tank 1 and the burner conjoined thereto. Preferably an end ofthe shield is extended down as at 75 somewhatv beyond the end of the burner tube' 33 in order to protect the tool somewhat and prevent diverting by wind or external influences of the lame issuing from said burner. rlhe shield may be apertured as at 77 to permit the air to enter the burner perforations 39. The shield may be readily slid over the tool end of the device and will be retained in place by its frictional engagement therewith.

lVhile the device as illustrated herein is shown in connection with a soldering iron it will be understood that paint removing tools or other tools may bc used in connection therewith as desired. l

All solder irons are coated with tinning; ln soldering, this tinning must be retained on the iron.l As a resultr the iron cannot be heated sufliciently highr to quickly and effectively transmit heat from the flame to the work. By my invention the heating of the work is not Aretarded by the limit to the heat of the iron, since the heat of the iron is not relied on to heat the work, but the flame vperature without danger of melting the tinning thereon by relatively adj usting the iron either angularly or longitudinally with respect tothe liame, or by adjusting the flame by the burner valve asl described. Since the flame acts kdirectly on the work the work is readily-heated to the fusing temperature of As a result, for example,` if a seam is being soldered, the flame will draw or cause the solder to soak or penetrate down into or beneath the seam and will form a neat, smooth, strong joint and with actually less solder than by previous devices. Not only is more thorough and ellicient work obtained, but also the sold ering is effected withv economy intime and fuel.

Having described one embodiment of my invention, without limiting myself thereto what I claim.y as new and desire to secure by Letters .Patent is:

iin

l. A device of the class described, comprising, in combination, a tool, a fuel tank and an automatic forced blast burner assembled together for conjoint profitable use, said burner being arranged relatively to said tool to direct and distribute a forced blast flame simultaneously, effectively and directly diagonally along a substantial por tion of the tool toward the active end of the latter and on the work operated on, said burner being arranged suflicientlyk close to said tank to heat the latter and automatically create the forced blast.

2. A device of the class described comprising, in combination, a tool, a fuel tank and a single forced blast burner, said burner being arranged relatively to said tool to distribute a forced blast flame simultaneously, e'ectively and directly both on the tool and the work operated on, said burner being arranged closely to and overlapping said tank sufliciently to heat said tank and thereby create a forced blast in said burner.

3. A device of the class described comprising, in combination, a portable tank; a tool carried therewith; and means simultaneously to direct flame on the tank, tool and the work operated on.

l. A device of the class described comprising, in combination, a portable tool carrying tank; a tool heating burner; and means to direct a portion of the flame from said burner on to said tank at will while said burner is in a position to be effective to heat said tool.

5. A device of the class described comprising, in combination, a portable tool carrying tank; a burner; and an adjustable baffle plate for directing a flame from said burner to said tank.

6. A device of the class described comprising, in combination, a portable tool .carrying tank; a burner having a lateral hole therein; and a baflie plate adjacent said. hole to direct a flame therethrough on to said tank.

7. A device of the class described comprising, in combination, a portable tank; a burner and tool carried therewith; a stem for said tool; and provision'for rocking said tool relatively to said stem and securing said tool in adjusted position solely by the frictional engagement of the latter therewith.

8. A device of the class described comprising, ii'i combination, a portable tank; a burner and tool stemvcarried therewith; a voke threaded on said stem; a tool pivoted in said yoke and adapted to be engaged and held by said stem in different positions of adjustment.

9. A device of the class described comprising, in combination, a portable tank; a tool and burner carried therewith; and a shield inclosing the tank, burner, and a portion of the tool to prevent cooling of said parts.

l0. A device of the class described comprising, in combination, a portable tank; a tool and burner carried therewith; and a removable shield `covering said burner and extending along said tool to protect the llame from being diverted from the tool.

ll. A device of the class described comprising, in combination, a portable tank; a tool and burner carried therewith; air holes in said burner; and a removable shield for said tank and burner laterally apertured to permit air to enter said air holes, said burner being supported independently of said shield.

l2. A device of the class described comprising, in combination, a portable tank; a tool and burner carried therewith; and a handle adapted to be secured to said tank or to said tool.

13. A device of the class described comprising, in combination, aI tool, a fuel tank and an automatic forced blast burner assembled together for` conjoint portable use, said burner being arranged relatively to said tool to distribute a forced blast llame simultaneously, effectively and directly both on the tcol and the work operated on, said burner being arranged beneath and closely adjacent to said tank and overlapping the latter sufliciently to heat said tank by the rising heat radiating and conducted from said burner to said tank and thereby create a forced blast in said burner, and a tube of substantial length connected to said burner for conducting the heat gradually therefrom to the tank.

14. A device of the class described comprising, in combination, a tool, a fuel tank, and an automatic forced blast burner assembled together for conjoint portable use, said burner being' arranged relatively to said tool to distribute a forced blast liame on said tool, said burner being arranged beneath, closely to and in overlapping relation with said tank to heat the latter sufliciently to generate a forced blast in said burner, and a tube connected with said tool and entered into said tank a substantial distance and having provision for conducting heat from said burner gradually to the liquid in said tank to prevent objectionable heating of the fuel adjacent the point of juncture of the burner with said tank.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

LORENZO S. FROST. lVtnesses HENRY T. WILLIAMS, ROBERT H. KAMMLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

